A Reddit moderator has banned skeptics because he claims they don't believe in climate change or global warming. That is not true. No climate change skeptic denies the world got warmer during the last century (until about fifteen years ago). I'm not aware of any of them who deny that carbon dioxide produces warming.

What they deny is that there is overwhelming evidence that anthropogenic carbon dioxide is a significant cause of harmful warming. They accuse the climate change industry of exaggerating the evidence for this. The climate change industry in response distorts this to sound like they deny CO2 caused warming.